Golf ball



J.- WHITE.

GOLF BALL.

APPLICATION FILED OCT-22, x920.

1,418,220. n ed May 30, 1922'.

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x G YQWSML sTArEs JOHN WHITE, OF SUNNINGDALE, ENGLAND.

GOLF

BALL. r

' Specification of Letters-Patent. Patented May 30, 1922.

Application filed October 22, 1920. Serial No. 418,794.

To all whom it may concern:

Be it known that'I, JOHN WHITE, a sub-- ject of the King of England,residing at Sunningdale, Berkshire, England, have in-. vented certainnew and useful Improvements in Golf Balls, of which the following is aspecification. 1 This invention relates to improvements in golf balls,and has for'one of its objects'to provide a golf ball having adistinctive marking that will not be readily destroyed,- as for exampleby the blows from a club.

It is well known that the air pockets formed by depressions on thesurface of a golf ball materially assist in the fiight of the ball, andit is therefore important that these depressions should remain asclearly marked as possible and free from filling.

With the golf balls at present in use, particularly soft-cored balls, Ifind that the depressions very soon become damaged by repeated blowsfrom the club, and the life of the balls is consequently very short.

According-to my invention, therefore, I provide la golf ball having aplurality of depressions formed on its surface, and recesses formed inthe bottoms ofthese depressions. The depressions and recesses thereinmay' be of various shapes and proportions but I prefer to make thedepressions of rectangular formation and of comparatively shallow depthcombined with recesses therein of circular aperture. Y

The secondary recesses are preferably slightly deeper than the outerdepressions, and may have a width of approximately one-third of thewidth thereof.

The invention is illustrated by way of example in the accompanyingdrawing, in which-- I Figure 1 represents a golf ball, made according tothis invention and Figure 2 is a fragmentary sectional view takenthrough the centre of a' row of de pressions and drawn to a largerscale.

The golf ball has a plurality of-depressions" A formed on its surface,which depressions are preferably of rectangular formation as shown, andarranged so that ribs B are formed betweenthem; Small recesses C ofcircular aperture are formed in the bottoms of the depressions Aand areprotected from the direct blows froma-club by the said ribs B. The sidesD of a depression ,preferably slope inwards towardsthe bottom E so thatthe width of the aperture, at the surface of the ball is greater thanthe width at the bottom of the depression. The depressions A arecomparatively shallow and have fiat bottoms E, and the recesses Ctherein are preferablyslightly deeper-and have curved bottoms F, asshown in Figure 2. The width of a recess C is approximately one-third ofthe width across the bottom E of a depression.

I find that of the above proportions give very satisfactory results andalso present a striking appearance and my experiments have proved thatthey possess a much longer life than, fore made, one reason being ballsas hereto that the secondary recesses C are not directly affected by theblows from the club, but are'protected to some extent by the ribs B. 7What I claim as my invention'and desire to secure by Letters Patent is1.- A golf ball having a plurality of fiat bottomed depressions formedon its outermost surface and having recesses with spherical surfacesformed in the flat bottoms of said depressions, so as to provideintermediate between said surface and lowest point of golf balls havinga marking said recesses a surface that is at least approximatelyparallel face.

2. A golf ball having a plurality of depressions formed on its outermostsurface of which depressions the width is greater at the surface of theball than at the bottom of the depression, and having recesses formed inthe bottoms of said depressions, so as to to said outermost surprovideintermediate between said surface and lowest point of said recesses asurface that is at least approximately parallel to said outermostsurface.

3. A golf ball having a plurality ofv fiatbottomed depressions formed onits outermost surface and having recesses formed in the fiat bottoms ofsaid depressions the depth of said depressions being not less than oneseventh of the width of said depressions at the surface of the ball,substantially as and for the purpose hereinbefore set forth.

4. A golf-ball having a plurality of fiatbottomed depressions formed onits outer- 5 most surface and havingi'ecesses formed in the flat-bottomsof said depressions of a width not greater than one third of the Widthat the bottoms of said depressions, substantially as and for the purposehereinbefore set forth.

In testimony whereof ture.

JOHN 'WHITE.

. 1G I aflix my signs,-

